Question

решите уравнение
3*(х+10)=7*х+10
2*(х+15)=5*х+15

Answer 1

3(х+10)=7х+10
3х-7х=10-30
-4х=-20
х=5

2(х+15)=5х+15
2х-5х=15-30
-3х=-15
х=5